染料改性二氧化钛/石墨烯的制备及其在MB光催化降解中的应用  

Preparation of Dye-modified Titanium Dioxide/graphene and Its Application in Photocatalytic Degradation of MB

作　　者：李科宇 梁苗青 聂锦梅[1] 关芳兰[1] 鲍利红[1,2] LI Keyu;LIANG Miaoqing;NIE Jinmei;GUAN Fanglan;BAO Lihong(School of Materials Design&Engineering,Beijing Institute of Fashion Technology,Beijing 100029,China;Beijing Key Laboratory of Clothing Materials R&D and Assessment,Beijing 100029,China)

机构地区：[1]北京服装学院材料设计与工程学院,北京100029 [2]北京市服装材料研发与评价重点实验室,北京100029

出　　处：《北京服装学院学报（自然科学版）》2024年第2期1-10,共10页Journal of Beijing Institute of Fashion Technology：Natural Science Edition

基　　金：国家自然科学基金面上项目高取向多孔石墨烯/MXene复合纤维的制备及其在柔性纤维超级电容器的应用(52173001)。

摘　　要：为了改进石墨烯基粉末光催化剂水分散性差的问题,采用水热法制备了二氧化钛/石墨烯(TG),再以含有多个亲水基团的染料对TG共价接枝,制备出三元复合光催化材料;考察了染料和TG比例及不同染料结构对光催化剂带隙、水分散性的影响以及不同光催化剂对亚甲基蓝(MB)模拟污水的降解性能。结果表明:复合材料DTG系列带隙相对TG均变窄,对光响应范围延伸至可见光区;复合材料D_(2.70)TG水分散性良好,静置7 d后无明显沉淀聚集;D_(2.70)TG在可见光照射下2 h,其对于模拟污水中MB的去除率达到99%以上,经过5次光照循环后,去除率仍可达95%以上。To improve the water dispersibility of graphene based powder photocatalyst,titanium dioxide/graphene(TG)was first prepared using a hydrothermal method in this paper,and then the ternary composite photocatalytic materials were prepared by covalently grafting TG with dyes containing hydrophilic groups.The bandgap,water dispersibility,and photocatalytic degradation performance of methylene blue(MB)simulated wastewater of the photocatalysts were mainly investigated.The results showed that the bandgaps of the DTG series of composites were narrowed compared to that of TG,extending the light response range to the visible light region.The composite D_(2.70)TG exhibited good water dispersibility,and no significant precipitation aggregation occurred after 7 days of testing.The removal rate of MB in the simulated wastewater by D_(2.70)TG under the irradiation of visible light for 2 h was over 99%,and the removal rate remained above 95%after 5 cycles of experimentation.

关 键 词：石墨烯 TiO_(2) 光催化 染料 水分散 重氮化 

分 类 号：TQ342[化学工程—化纤工业] TS102.5[轻工技术与工程—纺织工程]